Answer :

There isn't clear proof as to what made the Mayans pack up and leave (yet) however, people believe it could have been caused by agricultural issues, revolts, and/ or the arrival of the Spaniards/ other invaders.
There isn't clear proof as to what made the Mayans pack up and leave  however, people believe it could have been caused by agricultural issues, revolts, and/ or the arrival of the invaders.
hope this helps!!!!!!!!!!!!